tex2lyx test: make box-color-*.tex sample compilable

Load required package textcomp.
Replace call to non-existent packages textcyr and textgreek with the backup definition of the commands as done by LyX export.
Do not load marvosym (clash with pifont) (LyX does not load the package either).
Remove invalid command \\ascii.

src/tex2lyx/test/box-color-size-space-align.lyx.lyx

@@ -45,7 +45,7 @@
 \language english
 \language_package none
 \inputencoding iso8859-15
-\fontencoding T1
+\fontencoding T2A,LGR,T1
 \font_roman "cmr" "default"
 \font_sans "berasans" "default"
 \font_typewriter "default" "default"
@@ -2897,21 +2897,7 @@ Characters
 \begin_layout Standard
 
 \size normal
-from package "ascii" and "ifsym": ®
-\begin_inset ERT
-status collapsed
-
-\begin_layout Plain Layout
-{
-\backslash
-ascii
-\backslash
-ETB}
-\end_layout
-
-\end_inset
-
-◻◼ ◙ ◙
+from package "ascii" and "ifsym": ®↨◻◼◙
 \end_layout
 
 \begin_layout Standard

src/tex2lyx/test/box-color-size-space-align.tex

@@ -6,7 +6,7 @@
 \usepackage{berasans}
 \renewcommand{\familydefault}{\sfdefault}
 
-\usepackage[T1]{fontenc}
+\usepackage[T2A,LGR,T1]{fontenc}
 \usepackage[latin9]{inputenc}
 
 \usepackage{geometry}
@@ -21,18 +21,17 @@
 \definecolor{note_fontcolor}{rgb}{0, 0, 1}
 \definecolor{shadecolor}{rgb}{1, 1, 0}
 \usepackage{framed}
+\usepackage{textcomp}
 \usepackage{calc}
 \usepackage{fancybox}
 \PassOptionsToPackage{normalem}{ulem}
 \usepackage{ulem}
 \usepackage{ifsym}
 \usepackage{ascii}
-\usepackage{textgreek}
-\usepackage{textcyr}
 \usepackage{subscript}
 \usepackage{tfrupee}
 \usepackage{bbding}
-\usepackage{marvosym}
+%\usepackage{marvosym} % clash with pifont (! \Cross already defined)
 \usepackage{wasysym}
 \usepackage{pifont}
 \usepackage{tipa}
@@ -46,6 +45,13 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands.
 \newcommand{\noun}[1]{\textsc{#1}}
+\DeclareRobustCommand{\greektext}{%
+  \fontencoding{LGR}\selectfont\def\encodingdefault{LGR}}
+\DeclareRobustCommand{\textgreek}[1]{\leavevmode{\greektext #1}}
+\ProvideTextCommand{\~}{LGR}[1]{\char126#1}
+\DeclareRobustCommand{\cyrtext}{%
+  \fontencoding{T2A}\selectfont\def\encodingdefault{T2A}}
+\DeclareRobustCommand{\textcyr}[1]{\leavevmode{\cyrtext #1}}
 %% The greyedout annotation environment
 \newenvironment{lyxgreyedout}{\textcolor{note_fontcolor}\bgroup}{\egroup}
 
@@ -508,9 +514,7 @@ smallskip 2:\vspace{\smallskipamount}
 \section{Characters}
 
 from package "ascii" and "ifsym": 
-\textregistered{\ascii\ETB}\textifsymbol[ifgeo]{48}\textifsymbol[ifgeo]{96}
-{\ascii\LF}
-\ascii\LF{}
+\textregistered\ETB\textifsymbol[ifgeo]{48}\textifsymbol[ifgeo]{96}\LF{}
 
 from textcomp: 
 \textnumero\texttrademark